Turbulent nonpremixed combustion

Biagioli, F. (1997). Modeling of turbulent nonpremixed combustion with the PDF transport method comparison with experiments and analysis of statistical error. In G. D. Roy, S. M. Frolow, and P. Givi (eds.), Advanced Computation and Analysis of Combustion. ENAS Publishers. 

Cha, C. M., G. Kosaly, and H. Pitsch (2001). Modeling extinction and reignition in turbulent nonpremixed combustion using a doubly-conditional moment closure approach. Physics of Fluids 13, 3824-3834. 

Masri, A.R., Dibble, R.W., and Barlow, R.S., The structure of turbulent nonpremixed flames revealed by Raman-Rayleigh-LIF measurements. Prog. Energy Combust. Sci., 22,307,1996. 

Barlow, R. S., R. W. Dibble, J.-Y. Chen, and R. P. Lucht (1990). Effect of Damkohler number on superequilibrium OH concentration in turbulent nonpremixed jet flames. Combustion and Flame 82, 235-251. 

Chen, J. Y. and W. Kollmann (1988). PDF modeling of chemical nonequilibrium effects in turbulent nonpremixed hydrocarbon flames. In Twenty-second Symposium (International) on Combustion, pp. 645-653. Pittsburgh, PA The Combustion Institute. 

Chen, J. Y., W. Kollmann, and R. W. Dibble (1989). PDF modeling of turbulent nonpremixed methane jet flames. Combustion Science and Technology 64, 315-346. 

Masri, A. R. and S. B. Pope (1990). PDF calculations of piloted turbulent nonpremixed flames of methane. Combustion and Flame 81, 13-29. 

Swaminathan, N. and R. W. Bilger (1997). Direct numerical simulation of turbulent nonpremixed hydrocarbon reaction zones using a two-step reduced mechanism. Combustion Science and Technology 127, 167-196. 

PDF calculations of turbulent nonpremixed flames with local extinction. Combustion and Flame 123, 281-307. 

DesJardin, P. E., and S. H. Frankel. 1998. Large-eddy simulation of a turbulent nonpremixed reacting jet Application and assessment of subgrid-scale combustion models. J. Physics Fluids 10(9) 2298-314. 

Coupling functions play a central role in reducing problems of turbulent diffusion flames to problems of nonreacting turbulent flows. In Section 1.3 and in Chapter 3, we emphasized that coupling functions are helpful for analyses of nonpremixed combustion. From the analysis of Section 3.4.2, it may be deduced that their utility extends to turbulent flows. Mixture fractions, which are conserved scalars (Section 10.1.5), were defined and identified as normalized coupling functions in Section 3.4.2. The presentation here will be phrased mainly in terms of the mixture fraction Z of equation (3-70). 

Of major interest concerning these problems are influences of turbulence in spray combustion [5]. The turbulent flows that are present in the vast majority of applications cause a number of types of complexities that we are ill-equipped to handle for two-phase systems (as we saw in Section 10.2.1). For nonpremixed combustion in two-phase systems that can reasonably be treated as a single fluid through the introduction of approximations of full dynamic (no-slip), chemical and interphase equilibria, termed a locally homogeneous flow model by Faeth [5], the methods of Section 10.2 can be introduced reasonably successfully [5], but for most sprays these approximations are poor. Because of the absence of suitable theoretical methods that are well founded, we shall not discuss the effects of turbulence in spray combustion here. Instead, attention will be restricted to formulations of conservation equations and to laminar examples. If desired, the conservation equations to be developed can be considered to describe the underlying dynamics on which turbulence theories may be erected—a highly ambitious task. 

The investigations mentioned thus far are concerned exclusively with laminar boundary layers. Although studies of turbulent boundary layers involving mass transfer have resulted in useful correlations, analyses of chemical reactions between nonpremixed combustibles in turbulent boun-... 

McMurtry, P. A., and Givi, P., Direct numerical simulations of mixing and reaction in a nonpremixed homogeneous turbulent flow. Combust. Flame 77, 171 (1989). 

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